package com.pl.grainmall.cart.controller;

import com.pl.common.constant.AuthServerConstant;
import com.pl.grainmall.cart.interceptor.CartInterceptor;
import com.pl.grainmall.cart.service.CartService;
import com.pl.grainmall.cart.vo.Cart;
import com.pl.grainmall.cart.vo.CartItem;
import com.pl.grainmall.cart.vo.UserInfoTo;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import java.util.List;
import java.util.concurrent.ExecutionException;

@Slf4j
@Controller
public class CartController {

    @Autowired
    private CartService cartService;

    //获取当前用户所有选中的购物项
    @GetMapping("/curentUserCartItems")
    @ResponseBody
    public List<CartItem> getCurentUserCartItems(){
        return cartService.getUserCartItems();
    }


    @GetMapping("/deleteItem.html")
    public String deleteItem(@RequestParam("skuId") Long skuId){
        cartService.deleteItem(skuId);

        return  "redirect:http://cart.grainmall.com/cart.html";
    }

    @GetMapping("/countItem.html")
    public String countItem(@RequestParam("skuId") Long skuId,@RequestParam("count") Integer count){
        cartService.changeItemCount(skuId,count);

        return  "redirect:http://cart.grainmall.com/cart.html";
    }

    @GetMapping("/checkItem.html")
    public String checkItem(@RequestParam("skuId") Long skuId,@RequestParam("check") Integer check){
        cartService.checkItem(skuId,check);

        return  "redirect:http://cart.grainmall.com/cart.html";
    }


    /**
     * 浏览器有一个cookie；user_key;标识用户身份，一个月后过期
     * 如果第一次使用jd的购物车功能，都会给一个临时的身份，
     * 浏览器保存后，每次访问都会带上这个cookie；
     * <p>
     * 登录：session有
     * 没有登录：安装cookie里面带来的user_key来做
     * 第一次：如果没有临时用户，帮忙创建一个临时用户
     *
     * @return
     */
    @GetMapping("cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {

        //1.快速得到用户信息，id，user-key
//        UserInfoTo userInfoTo = CartInterceptor.threadLocal.get();
//        log.info(userInfoTo.toString());

        Cart cart= cartService.getCart();
        model.addAttribute("cart",cart);

        return "cartList";
    }

    /**
     * 添加商品到购物车
     *  RedirectAttributes redirectAttributes
     *    redirectAttributes.addFlashAttribute();将数据放到session里面可以在页面取出，但是只能取一次
     *    redirectAttributes.addAttribute("skuId", skuId);将数据放在url后面
     *
     * @return
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer num,
                            RedirectAttributes redirectAttributes) throws ExecutionException, InterruptedException {

         cartService.addToCart(skuId, num);

        redirectAttributes.addAttribute("skuId", skuId);
        //解决重复提交
        return "redirect:http://cart.grainmall.com/addToCartSuccess.html";
    }

    /**
     * 跳转到购物车添加成功页
     * @param skuId
     * @param model
     * @return
     */
    @GetMapping("/addToCartSuccess.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId,Model model){
        //重定向到成功页面；再次查询购物车数据即可
        CartItem item= cartService.getCartItem(skuId);
        model.addAttribute("item",item);
        return "success";
    }


}
